Programming
Convert between camelCase, snake_case and CONSTANT_CASE when switching languages or refactoring code.
13 case styles · All at once
Case Converter
Paste or type text, and every case style is generated at once — UPPERCASE, Title Case, camelCase, snake_case, kebab-case and more. Click any row to copy.
Start typing or paste text — every case style appears below.
Case Styles Explained
UPPERCASE and lowercase
The simplest conversions. UPPERCASE turns every letter capital; lowercase turns every letter lower. Everything else — punctuation, numbers, spaces — stays the same.
Hello World → HELLO WORLD → hello world
Title Case
Each word gets its first letter capitalised and the rest lowercased. This converter uses a straightforward rule — every whitespace-separated word is treated the same way, without special handling for small words like "of" or "the".
the lord of the rings → The Lord Of The Rings
Sentence case
Everything is lowercased first, then the first letter of each sentence is capitalised. A sentence ends at ., ! or ?.
HELLO WORLD. HOW ARE YOU? → Hello world. How are you?
camelCase
Words are joined with no separator. The first word is lowercase; every following word begins with a capital. Commonly used for variable names in JavaScript, Java and Swift.
hello world example → helloWorldExample
PascalCase
Like camelCase, but the first word is also capitalised. Commonly used for class names and React components.
hello world example → HelloWorldExample
snake_case
Words are lowercased and joined with underscores. The convention in Python, Ruby and SQL.
Hello World Example → hello_world_example
kebab-case
Words are lowercased and joined with hyphens. Commonly used for CSS class names, HTML attributes and URL slugs.
Hello World Example → hello-world-example
CONSTANT_CASE
All uppercase, joined with underscores. Used for constants in most programming languages.
max retry count → MAX_RETRY_COUNT
dot.case
Words lowercased and joined with dots. Sometimes used for namespaced config keys or nested object paths.
user profile name → user.profile.name
aLtErNaTiNg cAsE
Letters alternate between lower and upper. The original spacing and punctuation are preserved. Used to convey sarcasm or emphasis in informal writing.
hello world → hElLo WoRlD
iNVERSE cASE
Every letter swaps its case. Uppercase becomes lowercase and vice versa. Everything else is preserved.
Hello World → hELLO wORLD
Reverse
All characters are reversed. Useful for puzzles, obfuscation, or quick text transforms.
hello → olleh
All Cases Side by Side
| Style | Example |
|---|---|
| UPPERCASE | HELLO WORLD EXAMPLE |
| lowercase | hello world example |
| Title Case | Hello World Example |
| Sentence case | Hello world example |
| camelCase | helloWorldExample |
| PascalCase | HelloWorldExample |
| snake_case | hello_world_example |
| kebab-case | hello-world-example |
| CONSTANT_CASE | HELLO_WORLD_EXAMPLE |
| dot.case | hello.world.example |
When You'll Need This
Headlines & titles
Turn uppercase headlines into proper Title Case, or lowercase into Sentence case for articles.
URL slugs
Convert titles to kebab-case for clean, SEO-friendly URLs and file names.
Database columns
Convert between camelCase and snake_case to match your database's naming convention.
CSS & HTML
Generate kebab-case class names, or dot.case for BEM-style structure.
Social & memes
Generate aLtErNaTiNg cAsE for comedic effect, or iNVERSE for emphasis.
Case FAQ
What is Title Case?
Title Case capitalises the first letter of each word. This converter uses a simple rule: every whitespace-separated word gets its first letter upper-cased and the rest lower-cased. It does not apply the more complex rules some publishers use for small words like "of" or "the".
What is Sentence case?
Sentence case lowercases everything, then capitalises the first letter of each sentence. A sentence ends at ., ! or ?. The very first letter of the text is always capitalised.
What is camelCase?
camelCase joins words together with no separator. The first word is lowercase, the rest have their first letter uppercase. Example: helloWorldExample. Common in JavaScript, Java and Swift.
What is snake_case?
snake_case replaces spaces with underscores and lowercases everything. Example: hello_world_example. Common in Python, Ruby and SQL.
What is kebab-case?
kebab-case replaces spaces with hyphens and lowercases everything. Example: hello-world-example. Common in CSS class names and URL slugs.
What is CONSTANT_CASE?
CONSTANT_CASE is all uppercase with words joined by underscores. Example: HELLO_WORLD_EXAMPLE. Common for constants in most programming languages.
Does the tool handle punctuation?
Yes. Punctuation is preserved in UPPERCASE, lowercase, Title Case and Sentence case. It is stripped in camelCase, snake_case, kebab-case, CONSTANT_CASE and dot.case, which are designed for code identifiers where punctuation is not allowed.
Is my text stored anywhere?
No. Everything runs in your browser. Your text is never uploaded or logged.
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